Any reason why in the cold it appears my battery drains after a few days and wont start the TT. In the summer this does not happen at all. Second year in a row. When it was warm I did try to find the drain, but never found it. And its just to cold to care now... thoughts?

Usually its the other way round, in summer it drains faster etc. but im guessing that the phone is working harder in the cold because its too cold, like a computer its good to have a cold processor but you can make it too cold to function as normal.

I would consider that its time for a battery change. A small car battery can have a capacity of roughly 40Ah, so at 70mA of drain, youd completely kill a battery in 23 days, or 571 hours. Dying in a week speaks to a weak battery.